Kraus C-GVS-910-15mm-15500BN Clear Alexandrite Glass Vessel Sink and Virtus Faucet, Brushed Nickel Glass sink is constructed from solid tempered glass Designed for above counter installation with standard US plumbing connections Sink features polished glass interior and exterior Certified and Listed by UPC, cUPC, CSA, IAPMO, ANSI and SCC Limited Lifetime Warranty